ISSN:
1573-5036
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary To examine the influence of nodulation on the production of nitrogenous compounds, soybean plants (Glycine max var. Tamanishiki) were grown with or without N-fertilizer in the field, and the changes in amino-N and allantoin-N content in the different organs were determined throughout the growth period. In the stem allantoin-N markedly increased after the flowering period and then decreased during seed formation. Allantoin accumulated in the pod (up to 70 per cent of total alcohol soluble-N) during pod formation, while in the seed the main N-compounds were amino acids, the allantoin concentration being very low. In well-nodulated soybeans grown without N-fertilizer, allantoin content in every plant organ was always high compared to beans grown with N-fertilizer, but amino-N content was comparatively low. Another experiment, in which soybean plants were allowed to form nodules by growing on a N-free medium, and in which a fixed-N supply was then controlled by the addition of various levels of ammonium, was made in a greenhouse. When nodules were formed, the subsequent addition of high concentrations of ammonium caused the accumulation of allantoin as well as the accumulation of amides and arginine. A possible role for allantoin and some aspects of its production in soybeans are discussed. re]19760421
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00015171
